Listening to the morning music on SWR 3975, around 1238 UTC, my attention was drawn to unexpected disturbances on the upper band.
After tuning to 3977 USB, I was surprised to hear two mans in Polish, the exchange of numeric messages (five-digit groups) between operators "Pilarka" and "Lawa".
1248 Pilarka ...koniec pracy Lawa ...teraz koniec. ( the end of work, now the end)
- I write late because I tried to find replays or next transmissions of these stations, but to no avail.
It is interesting that they worked in the BCS band and directly at a known, regular, strong commercial station frequency.